Class 2.5 ຄວາມຖືກຕ້ອງຂອງ DC -100V-300V ນັກຮຽນ Analog DC Voltmeter Gauge-PE152 School Educational Analog ໄຟຟ້າ DC ນັກສຶກສາ voltmeter ສຳ ລັບການສອນການ ນຳ ໃຊ້ການສຶກສາ
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